No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Configuration Guide - Reliability

S9300, S9300E, and S9300X V200R013C00

This document describes the configurations of Reliability, including BFD Configuration, VRRP Configuration, NSR Configuration, DLDP Configuration, Smart Link and Monitor Link Configuration, MAC Swap Loopback Configuration, EFM Configuration, CFM Configuration, Y.1731 Configuration.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
VRRP Monitoring the Uplink Status

VRRP Monitoring the Uplink Status

In some circumstances, additional technologies are required to enhance the VRRP active/standby function. For example, if the link from the master to a network is disconnected, VRRP cannot detect the fault or switch services. In addition, hosts cannot remotely access the network through the master. To solve this problem, configure VRRP to monitor the specified interface or uplink status.

After this is configured, when the master detects that the interface or uplink fails, the master reduces its priority to be lower than that of the backup and immediately sends VRRP Advertisement packets. After the backup receives the VRRP Advertisement packets, it detects that the priority in the VRRP Advertisement packets is lower than its priority. The backup switches to the master, ensuring traffic forwarding is not interrupted.

VRRP Monitoring the Status of the Interface Connected to the Uplink

When the interface connected to the uplink goes Down, the master reduces its priority so that the backup switches to the master to forward traffic.

Figure 3-6  Association between a VRRP group and the interface status

As shown in Figure 3-6, a VRRP group is configured between SwitchA and SwitchB, which are the master and backup, respectively. Both switches work in preemption mode. Association between VRRP and uplink interface Interface1 is configured on SwitchA. When Interface1 fails, the priority of SwitchA decreases. Then SwitchB becomes the master through negotiation, ensuring that user traffic is forwarded correctly.

Associating VRRP with BFD/NQA/Routing to Monitor the Remote Host or Network Connected to the Uplink

BFD/NQA/Routing detects connectivity of the uplink on the master. When the uplink of the master fails, BFD/NQA/routing rapidly detects the fault and instructs the master to adjust its priority. This triggers an active/standby switchover and ensures proper traffic forwarding.

Figure 3-7  Associating VRRP with BFD/NQA/routing to monitor the uplink status

As shown in Figure 3-7, a VRRP group is configured between SwitchA and SwitchB, which are the master and backup, respectively. Both switches work in preemption mode. BFD/NQA/Routing is configured to monitor the link from SwitchA to SwitchE, and association between VRRP and BFD/NQA/routing is configured on SwitchA. When BFD/NQA/routing detects the fault on the link from SwitchA to SwitchE, BFD/NQA/routing rapidly instructs the master to adjust its priority. Through VRRP Advertisement packet negotiation, SwitchB switches to the master so that user traffic is forwarded correctly.

Translation
Download
Updated: 2019-04-09

Document ID: EDOC1100065868

Views: 15912

Downloads: 6

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next